Lock.



No. 705,495. v Patentd July 22, I902.

A. WALLACE.

LOCK.

(Application filed Jan. 31, 1902.)

(In Model.)

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\ UNITED STATES PATENT OFFICE.

ALLEN B. wALL-AcE, OF NEwcAsTLE, PENNSY VANIA.

LOCK.

SPECIFICATION forming part of Letters Patent No. 705,495, dated July 22,1902.

Application filed January 3l,1902. s riaino. 91,984. (Remodel-1 To allwhom, it quay concern:

Be it known that I, ALLE B. WALLACE, a citizen of the UnitediStates ofAmerica,residing at Newcastle, in the county of Lawrence and State ofPennsylvania, haveinvented certain new and usefullmprovements in Locks,of which the following is a specification, ref erence being had thereintothe accompanying drawings.

My invention relates to certain new and useful improvements in looks,and has for its object, primarily, a lock which has economic features ofconstruction and simplicity of operation; furthermore, a lock in whichthe lockbolt may be secured from the interior of the door againstmovement when a key is inserted to actuate the same.-

With the above and other objects in view the invention further consistsin the novel details of construction and combination of parts to beclearly described in the following specification and fully set forth inthe claims.

Referring to the accompanying drawings, in which like characters ofreference indicate similar parts throughout the several views, Figure lis a plan View of a lock containing my invention with the plate removed.Fig. 2 is a plan view, partly broken away, showing the guide secured tothe inner face of the casing-plate. Fig. 3 is a plan view of the latchmember. Fig. at is an underneath plan View of the lock-bolt. View of thecasing, showing the engaging member for actuating the lock-bolt. Fig. 6is a like view showing the pawl" for securing the lock-bolt; and Fig. 7is a plan view, partly in secltion, showing the key for operating theThe latch 1 carries a contracted shank 2 and has the usual opening 3therein, in which engages the arm, suitably mounted on the knob-shank.(Not shown.) Stops 27 are carried by latchl andlimit the forwardmovement of the same by engagement with lugs 7 and S. Adownwardly-extending projection 4 is secured to the inner face of theplate'5 of the lock-casing and has an aperture therein through which thecontracted shank 2 of the latch-bolt operates. A spring 6 is mounted onthe shank 2 and engages the one side of Fig. 5-is a' sectional Theforward end of the lock-bolt is suitably recessed, as shown at 12 and13, for the reception of the lug 14, which is extended and enlarged andserves as a means for securing one of the plate-screws. (Not shown.) Thelock-bolt is cut away, as at 15, in order to per- -mit of the samepassing the lug 14: without engagement. The numeral 16 designates asimilar lug secured in the door-frame member 17, adapted toengage inrecess 13 when the lock-bolt is in its locked position.

An arc shaped cut-away portion 18 is formed in the lock-bolt and engagesthe arm 19,'which is 'mounted on a shank 20, pivotally secured in thecasing. The shank is operated by a suitable key and is shown as havingsquare ends. The lower portion of projection at is'enlarg'ed and hasone'end of a flat spring 21 rigidly secured therein, the forward portionof which spring is bent downwardly and engages the upper face of thelock-bolt. The free end of this flat spring is bent upwardly to form alug 22, the purpose of which will be hereinafter stated. An arm 23 ispivotally secured in the casing and has the ends ,of its shank notchedfor the purpose of receiving a key in order to operate the arm. The armis mounted above the spring and is adapted to have its free end engagingthe lat- 'ter when in a vertical position.

Thus when it is desired to prevent operation of the lockbolt when thelatter is in a locked position or otherwise it is only necessary tomovethe arm downwardly, when the same will engage the spring and have itsmovement limited by the lug 22, previously mentioned. For the purpose ofsecuring the arm in an inoperative po-- sition a leaf-spring 24: issecured in a boss 25,- whereby the free end of the arm may be supportedby the spring and disengaged there from by slight downward pressure ofthe key when the latter engages in the shank of the arm.

A stop 26, secured in the casing, prevents undue upward movement of thearm.

It will be noted that the flat spring exerts pressure at all times uponthe lock-bolt, thus securing the same normally in engagement with thelugs, which are received in the recesses 12 and 13, and when in a lockedposition the lock-bolt recesses are each engaged, the former by lug 14and the latter by lug 16.

I desire to call particular attention to the fact that with a lockconstructed as above described it will be absolutely impossible to use ajemmy, as the arm 23 is free to drop of its own weight, so that theperson opening the lock must be provided with both keys, it beingrequired that the arm 23 be held up by its key in order that the arm 19may be operated to actuate the bolt. As shown, the arms are preferablyoperative from both sides of the lock.

Having thus fully described my invention, what'I claim as new, anddesire to secure by Letters Patent, is

1. The combination with the lock-casing havingaprojection thereinthrough which operates the spring-pressed latch, of a lock-bolt securedin the casing and carrying a pin, a guide in which the pin operates, theunder face of the front end of the lock-bolt having recesses formedtherein, a lug secured in the casing and normally engaging inone of saidrecesses, the lower end of the said projection having a flat springrigidly secured therein, the free end of the spring extending downwardlyand engaging the upper face of the lock-bolt, with a lug carried by thesaid end, means pivotally secured in the casing for engagement with saidspring, whereby the lockbolt is held in an inoperative position, andmeans for operating the lock-bolt, substantially as described.

2. The combination with the lock-casing having the latch-bolt therein,of a lock-bolt mounted so as to have a pivotal and longitudinalmovement, means for operating the lock-bolt, the free end of saidlock-bolt having recesses therein, a lug secured in the easing andengaging in said recesses, a spring having its one end rigidly securedin the easing and its free end engaging the upper face of the lock-bolt,means in the casing for engaging said spring whereby movement of thelock-bolt is prevented, means for supporting said means, and means forlimiting the movement of said first-named means, substantially asdescribed.

In testimony whereof I afiix my signature in the presence of twowitnesses.

ALLEN B. WALLACE.

Witnesses:

MAUDE MOORE, JOHN Y. SHEEHY.

